LP#1095290: Wrap record navigation template next and previous arrows with spans.

Also affects one translatable string, by moving the arrow outside it;
there's no sense having it in the string.

Signed-off-by: Pasi Kallinen <pasi.kallinen@pttk.fi>
Signed-off-by: Kathy Lussier <klussier@masslnc.org>
Signed-off-by: Ben Shum <bshum@biblio.org>